can i install two rams ?

[Mohammed muhsin]

i have a ram 4gb
when i run cpu-z it says that it is 665.1 mhz does it means that it is 1600 mhz
i am planning to buy a 8gb ram 1600 mhz
can i put these two on my mother board asus P8H61 M LX Rev 3.0

 

[rgd1101]

665.1 x 2 = 1333
and here your motherboard spec
https://www.asus.com/Motherboards/P8H61/specifications/

 

[ModMonster]

I don't think your board will support 1600mhz RAM. It says it suppot upto 1333Mhz DDR3, You might be able to mix frequencies. You computer is a little dated, so even if your 4GB wont mix, you should still be fine with 8GB alone.